Abstract: Based an urgent demand and development trend of rapid development of coal preparation technology,the ratio of washed raw coal greatly increased,the coal preparation plants were large scaled,the operation of production with high efficiency,the technology processes for coal separation are differentiation,the equipment enlarged,the automatization of production,the standardized design and modular layout for production process in current China,the paper presents the recent main direction of developing coal preparation technologies is to further increase the level of enlarge,reliability and automatization of equipment,develop and prefect the technology of quality upgrading for lignite and deep cleaning technology for rare and lack of coal varieties.